Cautions:NTE varistors shortcircuit when subjected to surges beyond their peak current and energy ratings.NTE varistors shortcircuit when operated at steadystate voltages well beyond their voltage ratings, which may eventually result in opencircuiting leaving the circuit without protection.The following precautions should be taken to minimize this potential hazard:DDD

Fusing the varistor to limit high fault currents.

Protecting the surrounding circuitry by physical shielding.Locating the varistor away from other components.Typical Power Supply Circuit100H